package main
import "fmt"
func main() {
	nums:=[]int{2,3,4}
	sum:=0
	for _,num:=range nums{
		sum+=num
	}
	fmt.Println("sum:",sum)

	for i,num:=range nums{
		if num==3{
			fmt.Println("index",i)
		}
	}

	kvs:=map[string]string{"a":"apple","b":"orange"}
	for k,v:=range kvs{
		fmt.Printf("%s -> %s\n",k,v)
	}
	for i,c :=range "go"{
		fmt.Println(i,c)
	}
}